342304221 has 16 divisors (see below), whose sum is σ = 524315264. Its totient is φ = 194586624.

The previous prime is 342304213. The next prime is 342304223. The reversal of 342304221 is 122403243.

It is not a de Polignac number, because 342304221 - 2³ = 342304213 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (342304223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38176 + ... + 46281.

It is an arithmetic number, because the mean of its divisors is an integer number (32769704).

Almost surely, 2^342304221 is an apocalyptic number.

It is an amenable number.

342304221 is a deficient number, since it is larger than the sum of its proper divisors (182011043).

342304221 is a wasteful number, since it uses less digits than its factorization.

342304221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84660.

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 342304221 is about 18501.4653743967. The cubic root of 342304221 is about 699.5263605470.

Adding to 342304221 its reverse (122403243), we get a palindrome (464707464).

The spelling of 342304221 in words is "three hundred forty-two million, three hundred four thousand, two hundred twenty-one".